best 80% efficiency gas furnaces

7 Best Furnace Brands (2024 Guide) This Old House. Annual fuel utilization efficiency (AFUE) ratings measure how much fuel the furnace converts to heat, allowing you to gauge efficiency. A quality furnace has an 80%–99% AFUE rating. We don’t recommend buying a furnace below 80% AFUE. Though furnaces with higher AFUE ratings cost more, spending. See more

7 Best Furnace Brands (2024 Guide) This Old House
7 Best Furnace Brands (2024 Guide) This Old House from images.carriercms.com

Web  The lowest efficiency allowed by law for new gas furnaces is 78 percent, and some new models achieve 97 percent, near-total efficiency. The price of a furnace.

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